COMPASS
for molbox™ User’s Manual
© 1998-2003
DH Instruments, Inc
.
Page 88
9.5.4 [SEQUENCE]
TAB
The Test Definition
[Sequence]
tab is used to specify details of how the test points of a test
will execute (see Section 7.1). This includes defining dwell and data reading parameters as
well as the number of times to run the test (number of cycles). Note that the order of the
fields of the sequence tab follows the order of execution of the different steps of each flow
point when a test is actually run.
The purpose of the
[Sequence]
tab’s fields and settings as well as instructions on how to use
them are provided in Table 27.
Figure 50.
Test Definition Editor,
[Sequence]
Tab
Table 27.
Test Definition Editor,
[Sequence]
Tab Fields
FEATURE
DESCRIPTION
Stability
Test and Hold
Time
(required
numeric entry
fields)
Defines the stability limit to be used to determine a ready condition in the molbox
after a target flow is set. Generally, this value is set about 10 times smaller than
the DUT tolerance/second (see the molbox Operation and Maintenance Manual,
Ready/Not Ready Section). The associated time entry field is the Stability Hold time.
For
COMPASS to
consider that the stability test has been met and test
execution can continue, the ready condition (flow inside stability limit) must be
present and uninterrupted for the Stability Hold time. If during the Stability Hold
Time, the molbox outputs a not ready signal, the hold time will start over after the next
ready output is received. This process continues until either the stability test is
passed or the
<Stability Time-Out>
occurs.
Depending on the configuration of the test system and the performance of the
device controlling the flow, the flow may stabilize within the stability test and a
ready condition may occur momentarily before the flow has truly stabilized.
The Stability Hold Time can be used to assure that the flow remains stable for a
certain amount of time before the stability test is considered to have been met
and test execution continues.
Stability Time-
out
(required
numeric entry
field)
The maximum amount of time that the
<Stability Test>
process may consume.
If the stability test and Stability Hold Time have not been satisfied within the
<Stability Time-Out>
an indicating character is recorded in the Data File and on
the Test Grid and test execution continues. The stability time out is used to
assure that a test will not hang indefinitely if the stability test cannot be met at a
flow point.
Summary of Contents for COMPASS FOR MOLBOX
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